1987 IROC-Z open headers quick drive 2nd gear pulls Summit 8800 Cam

just a quick drive in my 1987 Iroc-Z with no exhaust temporarily from the y pipe back. Flowmaster is handing loose and unhooked u.der the car. Trying to get the ecu to play nice with the Summit Pro SBC 8800 .450/.450 204/214 cam after installing 1.6 rockers on the intake side. Cruising around in 2nd gear for now until I get a new transmission. The engine bay is in shambles, and the car needs some tuning and my distributer amd coil pack amd plug wires are just about shot. fuel regulator is missing the lock nut, timing is off. Still runs ok, but I've got a lot of work to do. until next time, stay tuned 😆

[@kronic9892]

Have the same exact motor in my truck and heads, but I have an elder block, performer, intake and carburetor, but I was thinking about getting that cam because I can’t go any bigger with those heads and trying to find LT heads is hard

[@jeremiahwasabullfrog8854]

Yeah it's do-able. It was either this or one of the comp extreme 4x4 cams. I think I could have gotten away with the X4260hr with 1.52 rockers and +.050 valve retainers with stiffer springs, which is .474 lift, about .480 with 1.52 rockers, would be about max lift without having to machine or really mess with the heads. Duration on those is a bit more. 210/214.

[@kronic9892]

@@jeremiahwasabullfrog8854 that comp cam is so much I’d rather save couple hundred get the 8800 I just got long tubes for wish I put a cam in the motor when I had it torn down and out of my truck

[@jeremiahwasabullfrog8854]

@@kronic9892 yeah that's exactly why I got the Summit Cam. And the 8801 and 8802 are about the same or one step up from an lt4 hot cam so if you ever decide to get a nice set of heads that can take more lift that's a decent option.

[@frigglebiscuit7484]

on vortec heads(dunno if its the same for older center bolt heads), drive your valve seals on all the way(factory didnt, and you lose lift clearance), grab some z28 springs, remove the inner damper spring, and youre good to like .500 lift. the valve springs are like 50-80 bucks. part number for the springs i like is howards: HRC98214

[@frigglebiscuit7484]

@@jeremiahwasabullfrog8854 i dont like comp cams rollers, because they use cast cores, whereas the sum-8800 series is billet cores(made by crane most likely)

[@nofember6912]

what rockers and retainers did you get? i have a 5.7 vortec and im looking at this cam also did you get any head work done to it?

[@jeremiahwasabullfrog8854]

I used the Comp Magnum Roller Tip self aligning rockers 1.6 and 1.52. I have no headwork done and they are basically what some people would call junk 193 / tbi swirlport heads. Transmission needs rebuilt so I may be going over the engine and possibly some new heads or a port job. Retainers were Summit 7° +.050 to give me more retainer to valve guide clearance. I also had to carefully grind the self aligning spurs down a smidge so they would have clearance simce there is less valve tip sticking up due to the +.050 retainers.

[@mikef7968]

That cam is thumping. Is this still the 8800 ?

[@jeremiahwasabullfrog8854]

Yes, it's the Pro Sbc 8800 with 1.6 rockers on the intake and 1.52 on the exhaust side for .480int. /.456exh. total lift cranking air into a set of 193 casting "tbi" heads with Summit valve springs rated for .490 lift and +.050 valve retainers for valve guide to retainer clearance. Heads are stock and fed by a Holley Stealth Ram fuel intected intake all running off a stock '87 tuned port ecu with a burned piggyback eprom chip. Running open stock manifolds, no exhaust from where the cat was until I find a 3" replacement pipe that fits to make a full 3" oit the back. Next step is porting another set of 193 heads amd then hopefully soon a fully rebuilt 700r4 transmission.

[@jeremiahwasabullfrog8854]

Timing is a little off and probably need a retune now, the 1.6 rockers made more of a difference than i thought. Should see the thing go in 1st gear from a slow roll it's silly. I should have recorded a little more. Just don't want to get arrested. 😆🤣🤣

[@mikef7968]

Yeah it's coming along nicely. I'm waiting on a back ordered timing chain from summit. Ordering a oil pump next week. Should have mine together end of the month. Let you know how it runs.

[@jeremiahwasabullfrog8854]

@@mikef7968 I ordered a double roller timing chain from Summit amd forgot to put it in. Still got it lol.

[@jeremiahwasabullfrog8854]

You're building the Grand Prix right? You should definately post up some videos, I'd give you a sub. I wanna know how those vortecs work out with this cam. Send me a link if you post up a vid.

[@ethanol-fb]

whats your idle vaccum? and idle speed i have the same cam but my idle vaccum is still 19 inches at 800rpm

[@jeremiahwasabullfrog8854]

I'm not sure actually but it's ok, I have no problems with power brakes or anything.

[@ethanol-fb]

@@jeremiahwasabullfrog8854 my idle sounds alot more stock than yours does

[@jeremiahwasabullfrog8854]

@@ethanol-fb 1.6 rockers and open headers in a 355c.i. motor. I ha e a couple other videos before i switched the rockers amd removed the cat, and it sounded almost stock then.